Why was Ted Koppel so influential as a news anchor?

Ted Koppel was influential as a news anchor primarily due to his role as the long-time host of ABC's "Nightline," where he showcased in-depth reporting and thoughtful interviews, particularly during times of crisis such as the Iran hostage crisis. His commitment to journalistic integrity and the pursuit of truth set a standard for broadcast news. Koppel's ability to engage viewers with serious topics while maintaining a calm demeanor contributed to his credibility and respect in the field. Additionally, his focus on global issues helped elevate public discourse on important matters.